Connecting rod guide



Feb. 25, 1941. F, N LARSQN 2,232,682.

coNNEcTYING ROD GUIDE Filed March 15, 1939 2 Sheets-.Sheet 1 By Qwoxlzn und @mmv m-m Feb. 25, 1,941. F. N.- MRS-0N 2,232,682

CONNECTING ROD GUIDE Filed March 15, 1939 2 Sheets-Sge?, 2

Inventor 'JKa//mm A torney s UNITED STATESPATENT OFFICE CONNECTING ROD GUIDE Frederick N. Larson, Coco Solo, C. Z.

This invention improvements in tion with engines Application March 15,

3 Claims.

appertains to new and useful adjuncts for use in conjuncwhile on the assembly line in manufacturing plants.

The principal object of the present invention is to provide a connecting rod guide especially adapted for use on radial type aircraft engines to the end that the connecting rod can be held against slapping action with the wall of the crankcase when the crankshaft is being turned over, as for instance when is being set.

Other objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings- Figure 1 represents a fragmentary side elevational View.

Figure 2 is Figure 3 is a a fragmentary top plan view.

longitudinal sectional view through the guide.

Figure 4 is a fragmentary sectional view through the guide band.

Figure 5 is a top plan View of a slightly modied form of the invention.

Figure 6 is a section on ure 5.

the line 6-6 of Fig- Referring to the drawings wherein like numerals designate case of a radial like parts, it can be seen in represents the cranktype aircraft engine with the usual annular cylinder attaching shoulder 6 protruding therefrom. cylinder attaching Numeral 1 denotes the threaded members projecting from the shoulder 6 and it is with a pair of diametrically opposite members 1 on each shoulder 6 that the present invention is associated with.

In carrying out the present invention, a metallic band 8 is employed, the same being of the split type and having one end reduced and formed in the nature of a posed through an opening thereof.

The band thus the connecting rod ll when the band is properly supported by the hook 9 which is dis- I0 in the other end formed serves as a guide for tension springs I2I2. These tension springs each has one end connected to an eye I3 on the embraces a ring band 8 while its opposite end I4 which is disposed over the corresponding threaded member 1. Thus it can be seen that the connecting rod Il cannot slap against the insides of the cylinder openings of the case 5 when the crankshaft is being turned A modified form of the invention is shown in Figure 5 wherein ber lplates springs I2, these is constructed in of tapered rubthe -band l5 pair rubber plates having their rethe timing mechanism 1939, Serial No. 262,053

over corresponding threaded members 1 as are l the rings I4 of the form of the invention shownA vin Figure 1.

Obviously with the present invention involving the springs,l the springs will serve to pull outwardly the connecting rods as they pass bottom dead-center. In the use of rubber bands and the like contemplated for the same purpose, the rub- -ber bands frequently break and fall into the crankcase and sometimes result in the clogging of an oil line.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the claimed as new is:

1. For use with an engine crank case having cylinder-attaching threaded members projecting therefrom, a connecting rod guide comprising a split band-like member for temporarily receiving and guiding a connecting rod, and members extending from the band and having eyes at their outer ends for disposition with certain of the said threaded cylinder-attachable meminvention, what is bers for supporting said guide in operative position.

2. For use with an engine crank case having cylinder-attaching threaded members projecting therefrom, a connecting rod guide comprising a split band-like member for temporarily receiving and guiding -a connecting rod, and members extending from the band and having eyes at their outer ends for disposition with certain of the said threaded cylinder-attachable members for supporting said guide in operative position, said split band having 'a hook and eye connection at its ends.

3. For use with an engine crank case having cylinder-attaching threaded members projecting therefrom, a connecting rod guide comprising a split band-like member for temporarily receiving and guiding a connecting rod, and members extending from the band and having eyes at their outer ends for disposition with certain of the said threaded cylinder-attachable members for supporting said guide in operative position,` said members extending from the band consisting of tension springs.

FREDERICK N, LARSON. 

